Image Segregation by Motion : Cortical Mechanisms and Implementation in Neural Networks
The experimental evidence suggesting that at an early visual cortical level neurones signal differences in speed or direction of motion is reviewed. The functional significance of these findings is examined from the point of view of higher processing in visual parallel networks. We suggest that elementary visual parameters are processed in a dual way, in a ‘discontinuity’ and in a ‘continuous’ stream and that the power of ‘visual routines’ is due in part to the interplay between these two streams.
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- 4.Gulyás, B., Orban, G.A., Duysens, J. and Maes, H.: The suppressive influence of moving textured background on responses of cat striate neurons to moving bars. J. Neurophysiol. 57, 1767–1791 (1987a)Google Scholar
- 5.Hawken, M.J., Parker, A.J. and Lund, J.S.: Contrast sensitivity and laminar distribution of direction sensitive neurons in monkey striate cortex. Suppl. Invest. Ophthalmol. Vis. Sci. 28, 197 (1987)Google Scholar
- 6.Koch, C. and Ullman S.: Shifts in selective visual attention : towards the underlying neural circuitry. Human Neurobiol. 4, 219–227 (1985)Google Scholar
- 7.Livingstone, M.S. and Hubel, D.H.: Anatomy and physiology of a color system in the primate visual cortex. J. Neurosci. 4, 309–339 (1984)Google Scholar
- 8.Marr, D.: Vision. W.H. Freeman and Co., San Francisco (1982)Google Scholar
- 9.Marroquin, J.L.: Surface reconstruction preserving discontinuities. A.I. Memo 792, 1–24 (1984)Google Scholar
- 10.Movshon, J.A., Adelson, E.H., Gizzi, M.S. and Newsome, W.T.: The analysis of moving visual patterns. In : Pattern Recognition Mechanisms. C. Chagas, R. Gattass & C. Gross (Eds.). Exp. Brain Res. Suppl. 11. New York : Springer-Verlag, p. 117–151 (1985)Google Scholar
- 12.Orban, G.A., Gulyás, B. and Spileers, W.: A moving noise background modulates responses to moving bars of monkey V2 cells but not of monkey VI cells. Suppl. Invest. Ophthalmol. Vis. Sci. 28, 197 (1987a)Google Scholar
- 13.Orban, G.A., Gulyás, B. and Spileers, W.: Influence of moving textured backgrounds on responses of cat area 18 cells to moving bars. Progr. Brain Res. in press (1988)Google Scholar
- 14.Orban, G.A., Gulyás, B. and Vogels, R.: Influence of a moving textured background on direction selectivity of cat striate neurons. J. Neurophysiol. 57 ,1792–1812 (1987b)Google Scholar
- 15.Orban, G.A., Kennedy, H. and Bullier, J.: Velocity sensitivity and direction selectivity of neurons in areas V1 and V2 of the monkey : influence of eccentricity. J. Neurophysiol. 56, 462–480 (1986)Google Scholar
- 21.Van Hulle, M.M. and Orban, G.A.: Entropy driven artificial neuronal networks and sensorial representation : a proposal. Special issue on ’Neural Computers’ of the Journal of Parallel and Distributed Computation. submitted(1988)Google Scholar